Milwaukee County Sheriff David Clarke, seen here in an unflattering photo, is being accused of threatening a medical examiner for releasing information about a series of mysterious jail deaths. (Spencer Platt/Getty Images)

The man Donald Trump is reportedly considering to head his Department of Homeland Security "verbally pummeled" a chief medical examiner for disclosing information about a series of mysterious deaths at a Wisconsin jail earlier this year, the examiner says.

Brian Peterson alleges that loyal Trump surrogate David Clarke "threatened" him over the phone for releasing information about the deaths of Terrill Thomas, 38, and Michael Madden, 29 — both of whom were inmates at the Milwaukee County Jail when they died.

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Clarke, the sheriff of Milwaukee County, oversees the jail and has kept largely mum about the circumstances surrounding the inmate deaths.

After the county medical examiner's office announced over Twitter on Oct. 28 that it was investigating Madden's death, Peterson said a "furious" Clarke called and accused him of "political activism" before threatening to revoke his medical license.

"I haven't been talked to like that since I was probably 5," Peterson told the Journal Sentinel, adding that the Twitter announcement was a routine procedure for inmate deaths.

Peterson said he documented Clarke's threats in an email sent to his supervisors who told him they would have his back. They never heard from Clarke again.

"Sheriff Clarke's attitude was hostile, his mood was angry, and my attempts to mollify him were rudely rebuffed," Peterson wrote in the 1,231-word email. "I'm baffled that such an appropriate information release could be termed 'political activism.'"

A total of four deaths have occurred at the Milwaukee County Jail since April. (Google Maps Street View)

While Madden reportedly died from a seizure, an inmate told local media outlets that a corrections officer at the jail picked the young inmate up and dropped him on his head after believing he was faking the fatal seizure. No one has been charged in his death.

In the email to his supervisors, Peterson also said that Clarke, during their 20-minute phone call, had "excoriated" him for not giving the sheriff's office a heads-up before releasing the autopsy report for the other inmate, Terrill Thomas, whose April 24 death was ruled a homicide.

Thomas, who is mentally challenged, reportedly died from "dehydration," but inmates in adjoining cells testified that guards had shut off his water faucet for days before his death. No one has been charged in Thomas' death either.

Clarke, here with Donald Trump and Rudy Giuliani, stumped for the President-elect throughout his campaign. (Eric Thayer/Reuters)

Another two deaths have occurred at the jail since April — one involving a newborn baby.

The string of jail deaths have triggered some local politicians to call for Clarke's resignation.

"Media reports and the statements of witnesses indicate that at least three of the deaths appear to have occurred as a result of actions or inaction by Sheriff Clarke's corrections officers," Milwaukee County Board Supervisor Moore Omokunde said in a Thursday statement. "Yet not a single officer has been disciplined, and Sheriff Clarke remains silent. This is totally unacceptable."

The controversial sheriff is reportedly one of six candidates considered for the DHS post. (TANNEN MAURY/EPA)

Clarke, in turn, issued a statement of his own, mocking Omokunde's African last name.

"Supervisor who? That sounds like some character in a science fiction comic book and he's upset that I helped Donald J. Trump get elected," the sheriff said in the brief statement.

The President-elect's transition team did not immediately return a request for comment from the Daily News on Clarke's alleged inaction over the jail deaths.

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The controversial sheriff stumped for Trump throughout his campaign and has become notorious for making racially charged comments and denying the existence of police brutality.

Among other things, Clarke has compared the Black Lives Matter movement to the KKK and once claimed that African-Americans sell drugs "because they're uneducated, they're lazy, and they're morally bankrupt."